I thought some folks here might enjoy this Earl Smallshaw clinic that was recorded at the 2009 NMRA Convention. I was gonna add it to my PF post but this being Sunday, I think I'll just post it separately. My PF post was about selective compression, modeling the mundane (the typical), and distance between interesting / operational segments. Not all of this clinic deals with that, but a fair amount does. Plus its just fun to watch a master at work.
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Part 1
Part 2
Part 3
Part 4